The invention discloses a rotary blowing type
powder feeder which comprises a stock bin and a spiral conveyer shell. An outlet in the lower end of the stock bin is communicated with an inner cavity of the spiral conveyer shell, and a spiral
auger is arranged in the spiral conveyer shell. The
tail of the spiral
auger penetrates out of the spiral conveyer shell, and the penetrating-out end of the
tail of the spiral
auger is connected with a power mechanism through a transmission mechanism. The spiral auger is provided with a central gas channel in the axial direction, the
tail of the gas channel is connected with a fan through an air duct, the front end of the spiral auger is provided with a
small hole communicated with the gas channel, and the
small hole communicates the gas channel with a conical spraying area. The
small hole in the front end of the spiral auger rotates along with rotation of a spiral auger shaft, gas sprayed out of the small hole has the automatic rotating blowing effect on the conical spraying area at the front end of the spiral conveyer shell, mineral
powder particles, especially viscous fine mineral
powder particles are prevented from being aggregated or stuck to the wall, and the powder is continuously conveyed and sprayed in a
fluidization mode.